On the one hand there is the Nazi stamp from 1939 which might indicate that Reinhard was still in Germany during Shoah
http://des.genealogy.net/search/show/10955112
but even though conclusive evidence points to the fact that his mother was murdered in Teresienstadt he doesn't turn up in any holocaust archives.
On the other there are several records both at familysearch and ancestry which list a Dr. Reinhard Krambach as residing in England from at least 1942, married in 1947 (birth year, Germany, only, that matches) died 1963. Only the birth year to go on.
Is the Dr. Reinhard Krambach (Dr. 1915 Leipzig?) the same as this Reinhard Krambach?